Simplify gyp rules on video_render_module.
Simplify gyp rules on video_render_module.

R=kjellander@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/28439004

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 33aa095896640fb5864ec34ebb1bae06b889edfd

sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc